Abstract
This paper presents an optimal control system of water distribution networks. To overcome the large scale and nonlinearity of the network, a network aggregation technique and a two-level control scheme are developed. The first level of the scheme decides operating points using a nonlinear optimization method, where a high speed solving technique of pressure/flow is derived from network flow theory. The second level is a feedback control around the operating points, which absorbs estimate error and small variation in consumption. The scheme has been realized by a minicomputer system and is presently in operation.
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